Muffler.



P. Br HERRIQT.

MUETFLER. APPLICATION FILED FEB, 9, 15)*11 Patented 0st, 22, 1912,

'UNITEDSTATESPATENT OFFICE.

1,042,347 Specihcation o! Letters Patent. l, gPatented. 22, 1912.

. Application' tiled February; 9, 1911. Seriell.. 607,464.

H, I and J is a had M what is provided Arranged over the ends of the cylinders To all whom 'it may concern: l Y

Be it known that I, Fminnnrc-1rIk BirrMAN with concentric annular anges M', M2, M, HERRIOT, a citizen of the UnitedStates, rethe inner walls offwhich are slightly beveled f l U siding at Shelton, in the county of. F airfield to receive the ends of the respective cylin- 60 i 5 and Statewof` Connecticut, have invented'v a ders in vsuch a manner that a ht jointwillnew and' useful Improvement in Mulders,- of be formed between the same. ('h'e heads A which the following is a'specificationd(`ff$.11A pand KU are locked on the end of the outer This invention relatesk to certain new and cylinder G vby longitudinal Abolts .N having i, useful improvements in mufliers especially nuts N for securing the heads in position, 35 ltlladapted to be `used in connectionwith gas and the head N is locked on the ends of the engmes, the 4object being to provideva rnuf-l cylinders H, I and J by pins O extendn iler which will deaden the sound of the eX- through openings formed in the bolts, an

haust without causing back pressure to any said bolts extend between thi cylinders H extent. and I as clearly shown. It will be seen that 70 .15,` Another object of my invention is to proby this manner of connecting the heads and vide a muffler which 1s exceedingly simple cylinders, the mufiler can be readily taken and cheap in construction, and one which is apart by simplyunscrewing the nuts and re composed of a plurality 'of concentric cylmoving the pins. I inders through which the exhaust gases are i The inner cylinder J is provided with an- 75 20,'adapted to `pass before they escape to the.A "nular rows of perforations J through which open air: said cylinders being so arranged the gases are adapted to pass into the comand having openings-for causing the exhaust partrnent surrounding said cylinder formedl gases to pass from one end to the other of by the cylinder J .which is likewise provided the cylinders. with annular rows of perforationsl out of so j A still further object of my invention is alineme'nt with the perfor-ations J through to provide a rnuilerwhich is so constructed which'the exhaust gases lpass into the comthat the same can bread'lily taken apart in partment formed by the cylinderI and J, order to clean the same 'if necessary, said and the cylinder H is also provided with `parts being held together by bolts and pins.v perforations H out of which the exhaust 85 `30.`- VViththese objects in view, the invention gases pass into the compartment formed by consists in the novel 'featuresof construe4 the outer cylinder G, and. tirecylinder H, y tion, combination and arrangement of parts and from which -they escape through 'the hereinafter fully described, and pointed out boss K of the head K. The head M 1s proy l in the claim.; vided with perforations P, P', P2 com- 9o 315.4 In .the drawing forming art othis municating with the respective 'compartspeciticat'ionz-Figure 1 is a on itudinal ments formed by the cylinders H, I and J section through my improved mu er. Fig. and through which the exhaust gases are 2 is a section taken online 2*-2 of Fig. l.' adapted to pass.

In carrying lout my improved invention I The inner cylinder K is provided with a se*- e5'y 40 employ a circular head A which 'is provided ries of openings J 2 at its forward, end'of a with'a central internally threaded apertured` larger dlameter than the perforations, Aand boss B upon one side 'in which the exhaust the cylinder I is also provided with a series pipe from the engine is secured, and upon of similar openings I2 at the opposite end the opposite side of said head'are formed from the openings J 2, and the cylinder J 1s 100 concentric annular fianges C, D, E and F, provided with similar openings H2,wherehy the faces of which are slightly beveled for the forceof the exhaust passing throughm the purpose later described. Arranged these large openings will cause the spent within the concentriciianges C, D, E and F gases to travel'longitudinally of nthe coin.- are A'concentric cylinders G, H,I and J, the partments formed of the respective cylln- 105 4outer cylinder being of a' greater length than ders. l

l .the cylinders H, I and J. The free end of The operation of the muliler is. as iolsaid cylinder' has a heady K arranged'thereon lows z--The enhaust gases passing into the which is provided with a central boss K to cylinder J strike the head M whichl causes a which an outlet pipe is adapted to be con slight back pressure so as to force the gases ilo 5 nected `out throu h the perforations, the greater portion o the gases going through the larger openings causing a circulation from one end of the res ective compartments foi-med by the cylin ers in such a manner that the gases will travelthe length of the compartments before they reach the outer compartn'lent, and will be cooled to such an extent that a contraction in volume will be caused which will result in a fall in pressure.'

A ninlller comprising an outer cylinder prox'icled with heads, of a plnraltyof inner cylinders' of less length than the outer oylinder, and connected to one of the outer CyL incler heads, inner cylinders, and menne for securing said 1.3 inner cylinders in place, said inner Cylinders and the supplemental head being perforated, the perforations being enlarged adjacent alternate ends of said inner cylinders.

a supplemental head for the FREEERICK BITTMAN HERRIT.

vWitnesses: f y

Mrs.v F. EVELYN HERRIQT, CHARLES C. Hemmer. 

